Amp/pre amp for Nautilus 801

I have had my heart set on a Krell 600/700c because I know that I need a powerful amp for the N801; but, after following some of the discussions, I am beginning to think Krell may be too "bright". I am wondering if Levinson 436 monos are a better choice.

The system will be used primarily for classical music. Large orchestral.

My room is 50 x 32 x (16.5 ceilings). System will be used exclusively for classical music.

Any help would be appreciated.